Electric switch.



G. B. THOMAS.,-

ELECTRIC SWHCH.

APPucAreon man nic. s. 1915,

Patented June*y 25, 1918.

E] vwewfoz as URGE d Tfmm/#s UNITED STATES OFFICE.

GEUBGE B. THOMAS, F BEIDGEPORT, CONNECTICUT, ASEIGOR T0 THE :BRYANT ELEC- TBIC COMPANY, 0F BBIDGEPRT, CONNECTICUT, .A CORPORATION 0F CONNECTICUT.

ELECTRIC SWITCH.

Specification of Letters Patent.

Patented June 25, 1918.

T o all Awhom t may concern.'

.e it known that I, Grenen B, THOMAS, a citizen of the United States of America, residin in the city of Bridgeport, county of Fairle d, and State of Connecticut, have invented a certain new end useful improved Electric Switch, of which the foiiowixxg is a s ecification.

11 latched togo l form;

Fig. 2 is n. vertical section through this switch mechanism;

Fi 3 1s a detached perspective of the switc frame. end operating parts.; and

Fig. 4 is a'perspeotive of the wire termi nal and its associated switch terminal.

While m invention may be embodied in switches o sake o" illustration shown it in the aecom-v panyingdrawings in e pendent switch com prislng a eosin .hnving shell 10 and cap tici; in any suitable fashion. Contained within it is the of the switch,I which is here. shown in two parts 123ml 13.` L'lhese insulating buttons are recessed on their meetingl feces to4 afsides of the switch body.

ford a. switch chamber 14 into which extend the switch terminals 15 and 16 from the Wire terminals 17 and 18 on opposite These wire terminels form standards secured to the res ective buttons by screws 19 and 20, this rigldl uniting the buttons together. The switc terminals 15 and 16 are preferably of sp sheet metal independent of the wire termi- `nal s, and provided with base fiiiinges 21 underlying the base flanges of the standards dnd thus in electrical and mechanicalenga ement with the latter.

he switch mechanism within the cham 4 ber14 is carried by a frame 22 struck from sheet metal and `secured to the lower but ton 13 by the sccws 23. The endsl of the various types I have for the insulating bodyrv frame are angled upwardly and grooved' at l5 24 to form guide-\vays for Vthe ush buttous 25 and 26 at opposite ends 0F the push plate 27. The intermediate portion of the frame is centrali y and longitudinally slotted at 2E and is provided with bearing lugs 29 `on opposite sides of the Slot and also u standing pairs of stop lugs and 31. T le push plate 27 is of substantially the saine. width as the body of the frame and has a. depressed Jortion 32 centrally slotted et 33 and provi ed with a cross-pin 34 Within the slot. In the assembled position of the parts the slot 33 in the ush plate registers with the slot 28 in the rame. The yokesha ed switch piece 35 spivoted at its open en on' the lugs 29 of the frame. Its bridge is perforated et 36 to permit the stem 37 of the spring pin to pass therethrough. The lower end of the spring pin forms an enlarged heed slotted at 39 to receive the cross-pin 3i of the push plate 27. Between the shoulders 40 and the head of the spring pin and the bridge of the switch yoke 35 is confined the operating coil spring 41.

The operation of the switch mechanism is readily understood. Assuming the switch to be. in the olf position shown in Figs. l and 2, the switch piece 35 lies against the stop lugs 31 on the switch frame and is held iirmly in this position by the pressure of the switch spring 41 inasmuch 'as the push late which carries the spring pin 37 is held geinst further displacement by the impingement of its stop lugs 42 against the opposite face of the stops 31 on the frame. If now thel push button 25 be displaced 1nwrdly the head 38-of the push pin is carrind with the push plate past the axis of oscillation of the switch piece formed by the lugs 29 on the frame, traveling during this 95 movement in' the slot 2'8 in the frame.y Immediately the spring 41, which has been further compressed by this movement, throws the switch yoke in the opposite d1- rection until it impinges against thel stops 30 on the switch frame. In Vthis position the switch piece spansthe switch terminals 15 'and 16 and establishes the circuit through the switch.

The mechanism is ruggen. and serviceable and affords a wide break between the switch terminals 15 and 16, thus nilording a switch of high capacity while et the same time of themselves to others skilled in the art, par-v ticularl in adapting the switch for use in connection with the fittings of various other types, without, however, departing from what I claim as my invention.

I claim as my invention:

1. In an electric switch, a switch frame, an oscillating switch piece pivoted thereon, a reciprocating plate in sliding contact with the switch frame', a spring abutment moving therewith, a switch spring under compression between said abutment and the free end of the oscillating switchpiece and means for displacing said reciprocating plate to shift the abutment end of the switch sprin from one side to' the other of the axis 0% oscillation of the switch piece.

2. In an electric switch, a switch frame, an oscillating switch piece pivoted thereon, a reciprocating plate in sliding contact with the switch frame, a spring abutment moving therewith, a switch spring under compression between said abutment and the free end 0f the oscillating switch Vpiece and means for displacing said reciprocating late to shift the abutment end of the switc spring from one side to the other ofthe axis of oscillation of the switch piece, together with means for limiting the extent of movement of said reciprocating plate.

3. In an electric switch, a switch frame, an oscillating switch piece pivoted thereon, a reciprocating plate in sli-ding contact with the switch frame, a spring abutment moving therewith, a switch spring under compression between said abutment and the free end of the oscillating switch piece and means for displacing said reciprocating late to shift the abutment end of the switc spring from one side to the other of the axis of oscillationof the switch piece, together with means for limiting the extent .of oscillation of the switch piece.

4. In an electric switch, a switch frame having a longitudinal slot, an oscillating switch piece pivoted in said frame, a reciprocatin plate in sliding engagement with said switch frame and longitudinally slotted in register with the slot in the latter and having a cross pin in said slot, a switch operating spring and a guide pin for said spring engaging the switch piece at one end and having a headpivoted on the cross pin of said reciprocating plate together with means for' displacing said reciprocating plate to shift the head of said guide pin from one side to the other of the axis of oscillation of the switch piece.

5. In an electric switch, a switch frame having a longitudinal slot, an oscillating switch piece pivoted in said frame, a recprocatin plate in sliding engagement with said switch frame and longitudinally slotted in register with the slot in the latter and having a cross pin in said slot, a switch 0peiating spring and a guide pin for said spring engaging the switch .piece at one end and having a head pivoted on the cross pin of said reciprocating plate together with means for displacing said reciprocating plate to shift the head of said guide pin from one side to the other of the axis of oscillation of the switch piece, the head of said sprin I a ainst which one end of the switch spring a uts.

6. In an electric switch, a switch framey guide pin having shoulders naine to this specification. in the presence of two subscribing witnesses.

GEORGE B. THOMAS.

Witnesses:

G. W. Gooninon, H. M. Wicima'r. 

